Quinoxalines and related compounds. Part VII. Some reactions of quinoxaline N-oxides
Abstract
The photolysis of quinoxaline 1,4-dioxide in dilute hydrochloric acid gives 2-chloroquinoxaline 1-oxide as the major product. Treatment of 2,3-diphenylquinoxaline 1-oxide with phosphoryl chloride yields 6-chloro-2,3-diphenylquinoxaline, and the corresponding reaction with the 1,4-dioxide gives 5,7-dichloro-2,3-diphenyl-quinoxaline.